•Ifyourcomputerhasasecondarypowerswitchontherearofthecomputer,ensurethatitisswitchedon.
•Thepowerindicatoronthefrontofthecomputerison.
•Thecomputervoltagematchesthevoltageavailableattheelectricaloutletforyourcountryorregion.
Theoperatingsystemfailstostartup
Solution:Ensurethatthestartupsequenceincludesthedevicewheretheoperatingsystemresides.Usually,
theoperatingsystemisontheinternalstoragedrive.Formoreinformation,see“Changingthestartup
devicesequencepermanently”onpage40.
InstallationoftheWindows7operatingsystemfromanexternalopticaldriveoran
externalUSBdevicefails
Solution:Gotohttps://support.lenovo.com/us/en/documents/ht104142formoreinformation.
Thecomputerbeepsmultipletimesbeforetheoperatingsystemstartsup
Solution:Ensurethatnokeysarestuck.
Audioproblems
Thissectionprovidessolutionstoaudio-relatedproblems.
NoaudioinWindows
Solutions:
•IfyouareusingpoweredexternalspeakersthathaveanOn/Offcontrol,ensurethat:
–TheOn/OffcontrolissettotheOnposition.
–Thespeakerpowercableisconnectedtoaproperlygrounded,functionalacelectricaloutlet.
•Ifyourexternalspeakershaveavolumecontrol,ensurethatthevolumeisnotsettoolow.
•ClickthevolumeiconintheWindowsnotificationareaonthetaskbar.Ensurethatthemutespeakers
settingsarenotselectedandnoneofthevolumesettingsissettoolow.
Note:IfthevolumeiconisnotdisplayedintheWindowsnotificationarea,addtheicontothenotification
area.SeetheWindowshelpsystem.
•Somemodelshaveafrontaudiopanelyoucanusetoadjustvolume.Ifyourcomputerhasafrontaudio
panel,ensurethatthevolumeisnotsettoolow.
•Ensurethatyourexternalspeakers(andheadphones,ifused)areconnectedtothecorrectaudio
connectoronthecomputer.Mostspeakercablesarecolor-codedtomatchtheconnector.
Note:Whenexternal-speakerorheadphonecablesareconnectedtotheaudioconnector,theinternal
speaker,ifpresent,isdisabled.Inmostcases,ifanaudioadapterisinstalledinoneoftheexpansion
slots,theaudiofunctionbuiltintothesystemboardisdisabled.Therefore,youmustusetheaudio
connectorsontheaudioadapter.
•EnsurethattheprogramyouarerunningisdesignedforuseintheMicrosoft
®
Windows
®
operating
system.IftheprogramisdesignedtoruninDOS,theprogramdoesnotusetheWindowssoundfeature.
TheprogrammustbeconfiguredtouseSoundBlasterProorSoundBlasteremulation.
•Ensurethattheaudiodevicedriversarecorrectlyinstalled.
Soundcomesonlyfromoneexternalspeaker
Solutions:
•Ensurethatthespeakercableisinsertedcompletelyintotheconnectoronthecomputer.
•Ensurethatthecablethatconnectstheleftspeakertotherightspeakerissecurelyconnected.
46ThinkStationP310UserGuide